U.S. patent application number 13/123507 was filed with the patent office on 2011-10-06 for capacitor arrangement and method for producing a capacitor arrangement.
This patent application is currently assigned to MTU AERO ENGINES GMBH. Invention is credited to Hubert Herrmann, Jurgen Kneissl, Werner Riebesel.
Application Number | 20110242725 13/123507 |
Document ID | / |
Family ID | 41571529 |
Filed Date | 2011-10-06 |
United States Patent
Application |
20110242725 |
Kind Code |
A1 |
Herrmann; Hubert ; et
al. |
October 6, 2011 |
CAPACITOR ARRANGEMENT AND METHOD FOR PRODUCING A CAPACITOR
ARRANGEMENT
Abstract
The present invention relates to a capacitor arrangement having
a capacitor and a first terminal plate and a second terminal plate.
The capacitor has a first contact face and a second contact face
arranged opposite one another. The terminal plates are each
connected to one of the contact faces and have protrusions on one
end suitable for engaging in recesses in a power rail.
Inventors: |
Herrmann; Hubert;
(Haimhausen, DE) ; Riebesel; Werner; (Poing,
DE) ; Kneissl; Jurgen; (Jetzendorf, DE) |
Assignee: |
MTU AERO ENGINES GMBH
MUNICH
DE
|
Family ID: |
41571529 |
Appl. No.: |
13/123507 |
Filed: |
October 8, 2009 |
PCT Filed: |
October 8, 2009 |
PCT NO: |
PCT/DE09/01398 |
371 Date: |
June 17, 2011 |
Current U.S.
Class: |
361/306.2 ;
29/832 |
Current CPC
Class: |
Y10T 29/4913 20150115;
H01G 2/06 20130101; H02M 7/003 20130101; H01G 2/04 20130101 |
Class at
Publication: |
361/306.2 ;
29/832 |
International
Class: |
H01G 4/228 20060101
H01G004/228; H05K 3/30 20060101 H05K003/30 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 8, 2008 |
DE |
10 2008 050 452.1 |
Claims
1-11. (canceled)
12. An apparatus comprising: a capacitor having a first contact
face and a second contact face, the first and second contact faces
being spaced apart from one another; a first terminal plate
connected to the first contact face, the first terminal plate
having protrusions on one end suitable for engaging in recesses in
a first angled area of a first power rail of an electronic power
module; and a second terminal plate connected to the second contact
face, the second terminal plate having protrusions on one end
suitable for engaging in recesses in a first angled area of a
second power rail of the electronic power module; whereby the
capacitor with connected first and second terminal plates may be
arranged directly on the electronic power module.
13. An apparatus in accordance with claim 12, wherein the first and
second terminal plates are aligned parallel to one another.
14. An apparatus in accordance with claim 12, further comprising: a
first power rail of an electronic power module, the first power
rail having a first angled area including recesses formed therein;
a second power rail of an electronic power module, the second power
rail having a first angled area including recesses formed therein;
and wherein the first power rail is aligned parallel to the first
terminal plate and the second power rail is aligned parallel to the
second terminal plate and the protrusions on the first and second
terminal plates engage, respectively, in the recesses in the first
angled areas of the first and second power rails.
15. An apparatus in accordance with claim 14, further comprising: a
first connection between at least a few of the protrusions on the
first terminal plate and the first power rail, the first connection
having been formed by one of soldering and welding; and a second
connection between at least a few of the protrusions on the second
terminal plate and the second power rail, the second connection
having been formed by one of soldering and welding.
16. An apparatus in accordance with claim 15, wherein the first and
second connections are each disposed on a side of the respective
power rails opposite the capacitor.
17. An apparatus in accordance with claim 14, further comprising:
an angled area formed on each of the first and second terminal
plates; a second angled area formed on each of the first and second
power rails; and wherein the angled areas of the terminal plates
are configured to lie next to the second angled areas of the
respective power rails in a form-fitting manner when the
protrusions on the terminal plates engage in the respective
recesses of the power rails.
18. An apparatus in accordance with claim 17, wherein the angled
areas of each of the first and second terminal plates and the
second angled areas of each of the first and second power rails are
configured to accommodate a screw connection between the respective
terminal plate and the respective power rail.
19. A method for connecting a capacitor to a substrate, the method
comprising the following steps: providing a capacitor having a
first contact face and a second contact face, the first and second
contact faces being spaced apart from one another; providing a
first power rail and a second power rail, each power rail having a
first angled area with recesses; providing a first terminal plate
and a second terminal plate, each terminal plate having protrusions
on one end suitable for engaging in the recesses in the respective
power rails; connecting the first and second terminal plates to the
respective contact faces so that the first terminal plate is
aligned toward the first contact face and the second terminal plate
is aligned toward the second contact face; and connecting the first
and second terminal plates to the respective power rails so that
the first terminal plate is aligned parallel to the first power
rail and the second terminal plate is aligned parallel to the
second power rail and the protrusions on the first terminal plate
engage in the recesses in the first power rail and the protrusions
on the second terminal plate engage in the recesses in the second
power rail.
20. A method in accordance with claim 19, further comprising the
step of: joining the first and second power rails to a substrate
before the first and second terminal plates are connected to the
respective power rails.
21. A method in accordance with claim 19, further comprising the
step of: creating a connection between at least some of the
protrusions on the first terminal plate to the first power rail,
the connection being created using one of soldering and welding;
and creating a connection between at least some of the protrusions
on the second terminal plate to the second power rail, the
connection being created using one of soldering and welding.
22. A method in accordance with claim 19, wherein: the first and
second terminal plates each have an angled area and the first and
second power rails each have a second angled area and the angled
areas of the terminal plates are configured to lie adjacent to the
second angled areas of the respective power rails in a form-fitting
manner when the protrusions on the terminal plates engage in the
respective recesses of the power rails and further comprising the
steps of creating a first screw connection for connecting the
angled area of the first terminal plate to the second angled area
of the first power rail; and creating a second screw connection for
connecting the angled area of the second terminal plate to the
second angled areas of the second power rail.
23. An apparatus comprising: a capacitor having a first contact
face and a second contact face, the first and second contact faces
being spaced apart from one another; a first terminal plate
connected to the first contact face, the first terminal plate
having a plurality of protrusions on one end; a second terminal
plate connected to the second contact face, the second terminal
plate having a plurality of protrusions on one end; a first power
rail having a side portion with a first orientation and a
connection portion with a second orientation, the side portion and
the connection portion being disposed on opposite sides of a first
angled area including recesses formed therein; a second power rail
having a side portion with a first orientation and a connection
portion with a second orientation, the side portion and the
connection portion being disposed on opposite sides of a first
angled area including recesses formed therein; and wherein the side
portion of the first power rail is aligned parallel to, and in
contact with, the first terminal plate and the side portion of the
second power rail is aligned parallel to, and in contact with, the
second terminal plate and the protrusions on the first and second
terminal plates engage, respectively, in the recesses in the first
angled areas of the first and second power rails.
24. An apparatus in accordance with claim 23, wherein the
respective side portions of the first and second terminal plates
are aligned parallel to one another.
25. An apparatus in accordance with claim 23, wherein each of the
recesses on the first and second power rails are formed by punching
on three sides in the respective first angled area prior to forming
the bend of the first angled area.
26. An apparatus in accordance with claim 25, further comprising a
plurality of protrusions on the first and second power rails, at
lease one protrusion disposed adjacent to each recess on the
respective power rails.
27. An apparatus in accordance with claim 26, wherein the
protrusions on the first and second terminal plates protrude beyond
the protrusions on the first and second power rails.
28. An apparatus in accordance with claim 23, wherein the
protrusions on the first and second terminal plates protrude
completely through the recesses in the respective power rails to
the opposite side of the power rails.
29. An apparatus in accordance with claim 23, further comprising
terminal contacts formed on the respective connection portions of
the first and second power rails.
30. An apparatus in accordance with claim 29, wherein each terminal
contact is configured with multiple bends.
31. An apparatus in accordance with claim 23, further comprising:
an angled area formed on each of the first and second terminal
plates; a second angled area formed on the side portion of each of
the first and second power rails; and wherein the angled areas of
the terminal plates are configured to lie next to the second angled
areas of the respective power rails in a form-fitting manner when
the protrusions on the terminal plates engage in the respective
recesses of the power rails.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a U.S. National Phase application
submitted under 35 U.S.C. .sctn.371 of Patent Cooperation Treaty
application serial no. PCT/DE2009/001398, filed Oct. 8, 2009, and
entitled CAPACITOR ARRANGEMENT AND METHOD FOR PRODUCING A CAPACITOR
ARRANGEMENT, which application claims priority to German patent
application serial no. 10 2008 050 452.1, filed Oct. 8, 2008, and
entitled Kondensatoranordnung and Verfahren zum Herstellen einer
Kondensatoranordnung.
[0002] Patent Cooperation Treaty application serial no.
PCT/DE2009/001398, published as WO 2010/040343, and German patent
application serial no. 10 2008 050 452.1, are incorporated herein
by reference.
TECHNICAL FIELD
[0003] The present invention relates to a capacitor arrangement and
a method for manufacturing a capacitor arrangement.
BACKGROUND
[0004] EP 1 632 117 B1 relates to an electronic module for
switching electric power. The module has two power supply rails
spaced a distance apart from one another and a capacitor
arrangement which bridges the two power supply rails.
[0005] With the known approaches, so-called module capacitors are
constructed on a separate circuit board and connected to power
modules by means of connections of a suitable length. In addition
to the additional space required for the circuit board, an
additional circuit board layout is also necessary. In addition,
this also results in a poor utilization of space. The circuit board
is also associated with additional weight. The long connections
result in a higher inductance, which in turn results in limiting
the switching frequencies of the power modules.
SUMMARY AND DESCRIPTION
[0006] The object of the present invention is to create an improved
capacitor arrangement and an improved method for manufacturing a
capacitor arrangement.
[0007] This object is achieved by a device as described and claimed
herein as well as a method as described and claimed herein.
[0008] The present invention is based on the finding that a
capacitor can be applied to a substrate of a power module through
the use of specially shaped capacitor terminal plates without any
loss of lifetime. Damage to the capacitor due to high temperature
stress due to the soldering process can be prevented according to
the invention. In this way it is possible to ensure capacitor
availability after the manufacturing process.
[0009] Furthermore, a compact design of the power module optimized
with regard to installation space is made possible through the
special capacitor terminal plates. Therefore, contacts that have
been optimized with regard to installation space and weight and in
particular a low inductance contacting of the module capacitor on
the power module or electronic power module can be performed. This
leads to a low parasitic inductance between the power elements and
the capacitor. A better thermal connection of the capacitor to a
module cooler is also possible.
[0010] The present invention creates a capacitor arrangement having
the following features:
a capacitor having a first contact face and a second contact face,
where the first and second contact faces are arranged opposite one
another; a first terminal plate which is connected to the first
contact face, whereby the first terminal plate has on one end
protrusions suitable for engaging in recesses in a first angled
area of a first power rail of an electronic power module; and a
second terminal plate which is connected to the second contact face
whereby the second terminal plate has on one end protrusions
suitable for engaging in recesses in a first angled area of a
second power rail of the electronic power module.
[0011] The capacitor may be suitable for use in a power module.
Accordingly, the power rails may be designed to provide an
electrical connection between the capacitor and a substrate of the
power module. In particular the power rails may be so-called power
bus bar terminals. The recesses in the power rails may be
implemented in the form of grooves or through-holes. A direct
connection of the module capacitor, which may consist of the
capacitor and the terminal plates, to the power module is
advantageously possible. Therefore, a low inductance and a compact
design can be achieved. This is possible due to the special
inventive connection geometries for the module capacitor and the
power rails. A direction connection of the module capacitor to the
electronic power module may be achieved in particular through the
special terminal plates and power rails. The capacitor can thus be
arranged as close as possible to the electronic power module.
[0012] The contact faces and the terminal plates may be aligned in
parallel to one another. In this way the contact faces can be
connected to the terminal plates over the full area. The capacitor
may be arranged in a space-saving manner in parallel above the
substrate. Thus the terminal plates which are arranged
perpendicularly with respect to the alignment of the capacitor
permit the shortest possible connection of the capacitor to the
substrate.
[0013] The capacitor arrangement may have the first and second
power rails whereby the power rails may be aligned in parallel to
the terminal plates and the protrusions of the terminal rails may
engage in the recesses in the power rails. The inventive capacitor
arrangement may thus replace known module capacitors without
necessitating adjustments in the substrate, for example, the power
module.
[0014] The capacitor arrangement may have soldered connections
and/or welded connections, which are designed to connect at least a
few of the protrusions on the first terminal plate to the first
power rail and to connect at least a few of the protrusions on the
second terminal plate to the second power rail. Soldering of the
grooved capacitor terminal plates to the power rail terminals is
thus possible.
[0015] The soldered connections may advantageously each be arranged
on a side of the power rail opposite the capacitor. The soldered
connections can thus be created easily and in such a way that they
are accessible from the outside.
[0016] According to one embodiment, the terminal plates may each
have an angled area, which is designed in each case to be adjacent
to a second angled area of the power rails in a form-fitting
manner. The angled areas can stabilize the construction of the
capacitor arrangement and represent an additional electrical
contact.
[0017] Furthermore, the capacitor arrangement may have screw
connections, which are designed to connect each of the angled areas
of the terminal plates to the second angled areas of the power
rails. A simple connection of the module capacitor to the power
rails can thus be created. The angled areas of the module capacitor
can then be bolted to an intermediate circuit.
[0018] The present invention also creates a method for
manufacturing a capacitor arrangement comprising the following
steps:
[0019] Providing a capacitor having a first contact face and a
second contact face, whereby the first and second contact faces are
arranged opposite one another;
[0020] Providing a first power rail and a second power rail each
having a first angled area having recesses;
[0021] Providing a first terminal plate and a second terminal plate
each having on one end protrusions suitable for engaging in the
recesses in the power rails;
[0022] Connecting the terminal plates to the contact faces so that
the first terminal plate is aligned toward the first contact face
and the second terminal plate is aligned to the second contact
face; and
[0023] Connecting the terminal plates to the power rails so that
the first terminal plate is aligned in parallel to the first power
rail and the second terminal plate is aligned in parallel to the
second power rail and the protrusions on the first terminal plate
engage in the recesses in the first power rail and the protrusions
on the second terminal plate engage in the recesses in the second
power rail.
[0024] The present invention thus creates a manufacturing concept
for integration of capacitors on hybrid power modules which is
based on a special embodiment of the capacitor terminals and the
power rails. An inventive process description here defines how the
special capacitor embodiment is attached to the substrate. The
inventive manufacturing process proceeds in such a way that the
power rails are first applied to the substrate of the power module
without a capacitor. In a subsequent step, the module capacitor
consisting of the capacitor and the terminal plates is then
connected to the power rails by means of simple soldering.
[0025] The inventive method may include a step of joining the power
rails to a substrate before the terminal plates are connected to
the power rails. Due to the proposed sequence, it is possible to
prevent a great influence of temperature on the capacitor when the
power rails are soldered to the substrate. The substrate may be the
substrate of the power module. The substrate may be embodied as a
circuit board.
[0026] This method may comprise a step of creating soldered joints
which are embodied to connect at least a few of the protrusions on
the first terminal plate to the first power rail and to connect at
least a few of the protrusions on the second terminal plate to the
second power rail. In this way the capacitor arranged between the
terminal plates can be connected to the power rails, such that a
temperature influence on the capacitor can again be minimized.
[0027] According to the invention, the terminal plates may each
have an angled area, which is adjacent to a second angled area of
the power rails in a form-fitting manner, and the method may
comprise a step of creating a first screw connection for connecting
the angled area of the first terminal plate to the second angled
areas of the first power rail and a second screw connection for
connecting the angled area of the second terminal plate to the
second angled areas of the second power rail. The screw connection
allows an independent or additional electrical and mechanical
connection of the capacitor in addition to the soldered joint.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Preferred exemplary embodiments of the present invention are
explained in greater detail below with reference to the
accompanying drawings in which:
[0029] FIG. 1 shows an inventive capacitor arrangement;
[0030] FIG. 2 shows a diagram of the inventive capacitor
arrangement during production;
[0031] FIG. 3 another view of the inventive capacitor
arrangement;
[0032] FIG. 4 shows a view of the contact points on the inventive
capacitor arrangement;
[0033] FIG. 5 shows a diagram of an electronic power module having
the inventive capacitor arrangement;
[0034] FIG. 6 shows a capacitor arrangement according to another
exemplary embodiment of the present invention; and
[0035] FIG. 7 shows a diagram of a power rail and of a terminal
plate according to one exemplary embodiment of the present
invention.
DETAILED DESCRIPTION
[0036] In the following description of the preferred exemplary
embodiments of the present invention, the same or similar reference
numerals are used for the similarly acting elements depicted in the
various drawings, thereby omitting a repeated description of these
elements.
[0037] FIG. 1 shows a capacitor arrangement according to an
exemplary embodiment of the present invention. This shows in
particular a final modular diagram without a housing. The capacitor
arrangement has a capacitor 100, a first terminal plate 102 and a
second terminal plate 103. The terminal plates 102, 103 are each
connected to contact faces of the capacitor 100. The capacitor
arrangement may also have a first power rail 105 and a second power
rail 106. The power rails 105, 106 may be arranged on a substrate
108, for example, the substrate of a power module and may be
connected to the terminal plates 102, 103. Thus the capacitor 100
may be arranged between the terminal plates 102, 103 and the
terminal plates may in turn be arranged between the power rails
105, 106. According to the diagram in FIG. 1, the capacitor 100 is
aligned in parallel and above a surface of the substrate 108.
[0038] The contact faces of the capacitor 100 may be aligned
opposite and in parallel with one another. The first contact face
is connected to the first terminal plate 102 and the second contact
face is connected to the second terminal plate 103. Thus the
terminal plates 102, 103 may be aligned in parallel to the contact
faces. The terminal plates 102, 103 may be made of metal. The
terminal plates 102, 103 and the contact faces may be soldered to
create an electrical and mechanical connection. Known soldering
methods may be used to create the soldered connections.
[0039] For connecting the terminal plates 102, 103 to the power
rails 105, 106, the terminal plates 102, 103 each have protrusions
110 on the end facing the substrate 108. The protrusions 110 may be
embodied by rectangular recesses in the terminal plates 102, 103.
The protrusions 110 may be embodied over the entire length of the
end of the terminal plates 102, 103 or only in partial areas of the
terminal plates 102, 103.
[0040] The power rails 105, 106 may be made of metal and may be
adapted to the terminal plates 102, 103 in size and shape. Thus the
terminal plates 102, 103 may be in direct contact with the power
rails 105, 106. The power rails 105, 106 may have a bend on the end
facing the substrate 108. According to this exemplary embodiment,
the power rails 105, 106 are bent at a right angle, each in the
direction of the adjacent terminal plates 102, 103. In the area of
the bend the power rails 105, 106 have recesses. The protrusions
110 on the terminal plates 102, 103 may engage in the recesses.
Therefore the size and shape of the recesses may be adapted to
those of the protrusions 110. In this way the terminal plates may
be inserted from above along the power rails 105, 106 with the
protrusions 110 into the recesses and then lie on the angled area
of the power rails 105, 106. The power rails 105, 106 may have
terminal contacts 112 in the angled area. The power rails 105, 106
may be connected electrically and mechanically to the substrate 108
by means of known methods, for example, soldering methods by way of
the terminal contacts 112.
[0041] The terminal plates 102, 103 and the power rails 105, 106
may each have an angled area 114 on the end opposite the substrate
108. According to this exemplary embodiment the angled areas 114
are shaped by protrusions on the terminal plates 102, 103 and the
power rails 105, 106. These protrusions are bent at a right angle
on the side facing away from the capacitor 100 to create the angled
areas 114. The areas 114 of the terminal plates 102, 103 and of the
power rails 105, 106 that are angled at the top may each overlap
and thus form bundles of laminations. The bundles of laminations
may have a hole for receiving a screw.
[0042] FIG. 2 shows the inventive capacitor arrangement during
production, in which the module capacitor consisting of the
capacitor 100 and the terminal plates 102, 103 soldered to the
capacitor 100 is subsequently inserted between the power rails 105,
106. "Subsequently" here means that the power rails 105, 106 have
first been connected to the substrate 108. In addition to the
features already described on the basis of FIG. 1, FIG. 2 shows the
recesses 211 in the power rails 105, 106. According to this
exemplary embodiment, the recesses 211 are rectangular holes, which
are arranged in the area of the rectangular bends in the power
rails 105, 106 and extend on both sides of the bend.
[0043] To manufacture the inventive capacitor arrangement, first
the capacitor 100, the power rails 105, 106 and the terminal plate
102, 103 may be provided. In one step of the method, the terminal
plates 102, 103 are connected to the contact faces of the capacitor
100. A soldering operation may be used here. In another step of the
method, the terminal plates 102, 103 are joined to the power rails
105, 106. The joining may be accomplished by using a plug
connection by means of the protrusions 110 and the recesses 211, a
soldered joint and additionally a screw connection of the angled
areas 114. The angled areas 114 may be formed before or after
joining the capacitor module 100, 102, 103 to the power rails 105,
106.
[0044] Thus, in order to integrate the capacitor 100 "into" the
power module, the following steps are performed in a reasonable but
freely selectable order. In one step of the method the terminal
plates 102, 103 for the capacitor 100 can be applied to the
capacitor 100 according to a known procedure. To do so, the
capacitor 100 may be assembled with specially shaped (grooved)
terminal plates 102, 103. Furthermore, the power rails 105, 106 may
be applied to the substrate 108 by a known method. This may include
applying the "metallic" power rails 105, 106 to copper conductors
on the carrier substrate 108 at a high temperature. A dummy
capacitor including terminals may have already been positioned to
maintain the subsequent distances or the correct positioning of the
power rail terminals may be ensured by a corresponding soldering
device. After the connections of the power rails have cooled, the
actual capacitor 100 may be inserted together with the terminal
plates 102, 103 into the power rail grooves 211 and joined to the
power rails 105, 106 with the help of a known soldering method or
welding method. In conclusion, the individual metal packages may be
converted to the proper shape at the upper end accordingly and
bolted to the intermediate circuit terminal. In doing so, the upper
capacitor terminals 114 with the upper power rails terminals may be
angled by 90.degree. and then bolted to the intermediate circuit
terminals. Thus, there can be a connection of the module capacitor
to the power rail terminals by soldering the capacitor 100 and/or
its terminals 102, 103 without exposing the capacitor film to an
excessively high temperature.
[0045] FIG. 3 shows a diagram of the inventive capacitor
arrangement from underneath. In particular this shows contact
points on the module capacitor with the power rail 106 in a view
from the outside. The contact points are located in the areas where
the protrusions 110 of the terminal plate engage in the recesses in
the power rail 106. For joining the terminal plate to the power
rail 106 the protrusions 110 may be soldered to the power rail 106
from the outside.
[0046] FIG. 4 shows a diagram of the partial area of the inventive
capacitor arrangement. In particular additional contact points
between the module capacitor and the power rail 105 are shown in a
view from the inside. The contact points are implemented by means
of the terminal contacts 112. The terminal contacts 112 are
implemented as angled protrusions on the power rail 105. The
terminal contacts 112 may be in flat contact with a printed
conductor of the substrate 108 and may be soldered to the printed
conductor. The terminal contacts 112 may be bent several times,
e.g., at a right angle to compensate for thermal and mechanical
stresses.
[0047] FIG. 5 shows a diagram of the inventive capacitor
arrangement as part of an electronic power module. In particular
this shows a schematic diagram of the electronic power module,
which has the inventive capacitor arrangement. The electronic power
module has a housing 520. This housing 520 surrounds the capacitor
of the capacitor arrangement at least partially. Furthermore, this
shows a connecting line, which is connected to the capacitor
arrangement by a screw connection.
[0048] FIG. 6 shows a diagram of an inventive capacitor arrangement
according to another exemplary embodiment of the present invention.
The capacitor arrangement differs from the preceding exemplary
embodiments in particular in the design of the power rails. This
shows among other things the terminal plate 603 and a power rail
606 of the capacitor arrangement.
[0049] FIG. 7 shows a diagram of the terminal plate 603 and the
power rail 606 of the capacitor arrangement shown in FIG. 6. The
power rail 606 has recesses into which the protrusions 110 of the
terminal plate 603 can be inserted. To design the recesses, the
power rail 606 may be punched repeatedly on three sides. The areas
punched out form protrusions 730 which may be aligned parallel to
the protrusions 110 on the terminal plate 603. The protrusions 110
on the terminal plate 603 may protrude both laterally and
longitudinally beyond the protrusions 730 on the power rail 606.
The areas not punched out of the power rail 606 are bent and may
form the terminal contacts 112 at the ends. As an alternative to
punching, the protrusions 730 may be created by cutting, lasering
or by some other method.
[0050] The exemplary embodiments described here are selected only
as examples and may be combined with one another. The capacitor,
the terminal plates and the power rails may be embodied in the form
shown or in another suitable form. Furthermore, a plurality of
capacitors may also be used. The steps for integration of the
module capacitor may also be performed in an order other than that
described here.
* * * * *